2018 LEXUS LS500 headlights

1794-3. Operating the lights and wipers
LS500_OM_OM50F54U_(U) 4
Driving vehicle ahead that is using fog lights with-
out its headlights turned on is detected.●
House lights, street lig hts, traffic signals,
and illuminated billboards or signs and
other reflective objects may cause the
high beams to change to the low beams,
or the low beams to remain on.●
The following factors may affect the
amount of time taken for the high beams
to turn on or off:
• The brightness of the headlights, fog
lights, and tail lights of vehicles ahead
• The movement and direction of vehicles
ahead
• When a vehicle ahead only has opera-
tional lights on one side
• When a vehicle ahead is a two-wheeled
vehicle
• The condition of the road (gradient,
curve, condition of th e road surface, etc.)
• The number of passengers and amount of
luggage in the vehicle●
The high beams may turn on or off unex-
pectedly.●
Bicycles or similar vehicles may not be
detected.●
In the following situations the system may
not be able to correctly detect the sur-
rounding brightness le vel. This may cause
the low beams to remain on or the high
beams to flash or dazzle pedestrians or
vehicles ahead. In such a case, it is neces-
sary to manually switch between the high
and low beams.
• When driving in inclement weather
(heavy rain, snow, fog, sandstorms, etc.)
• When the windshield is obscured by fog,
mist, ice, dirt, etc.
• When the windshield is cracked or dam-
aged
• When the camera sensor is deformed or
dirty
• When the temperature of the camera
sensor is extremely high
• When the surrounding brightness level is
equal to that of head lights, tail lights or
fog lights
• When headlights or tail lights of vehicles
ahead are turned off, dirty, changing
color, or not aimed properly
• When the vehicle is hit by water, snow,
dust, etc. from a preceding vehicle • When driving through an area of inter-
mittently changing brightness and dark-
ness
• When frequently and repeatedly driving
ascending/descending roads, or roads
with rough, bumpy or uneven surfaces
(such as stone-paved roads, gravel roads,
etc.)
• When frequently and repeatedly taking
curves or driving on a winding road
• When there is a highly reflective object
ahead of the vehicle, such as a sign or
mirror
• When the back of a preceding vehicle is
highly reflective, such as a container on a
truck
• When the vehicle’s headlights are dam-
aged or dirty, or are not aimed properly
• When the vehicle is listing or titling due to
a flat tire, a trailer being towed, etc.
• When the headlights are changed
between the high beams and low beams
repeatedly in an abnormal manner
• When the driver believes that the high
beams may be flashing or dazzling
pedestrians or other drivers ■
Temporarily lowering sensor sensitivity
The sensitivity of the sensor can be tempo-
rarily lowered.
1 Turn the engine switch off while the fol-
lowing conditions are met.
●
The headlight switch is in or . ●
The headlight switch lever is in high beam
position. ●
Automatic High Beam switch is on.
2 Turn the engine switch to IGNITION
ON mode.
3 Within 30 seconds after step 2 , repeat
pulling the headlight switch lever to the
original position then pushing it to the
high beam position quickly 10 times,
then leave the lever in high beam posi-
tion.
4 If the sensitivity is changed, the AHB
indicator is turn on and off 3 times.
Automatic High Beam (headlights) may
turn on even when the vehicle is stopped.

1814-3. Operating the lights and wipers
LS500_OM_OM50F54U_(U) 4
Driving 1 (U.S.A.) or (Canada)
Off
2 Rain-sensing wiper operationThe wipers will operate automatically when
the sensor detects falling rain. The system
automatically adjusts wiper timing in
accordance with rain volume and vehicle
speed.
3 (U.S.A.) or (Canada)
Low speed wiper operation
4 (U.S.A.) or (Canada)
High speed wiper operation
5 (U.S.A.) or (Canada)
Temporary operation
When is selected, the sensor sen-
sitivity can be adjusted by turning the
switch ring.
6 Increases the sensitivity
7 Decreases the sensitivity 8 Washer/wiper dual operation Wipers will automatically operate a couple
of times after th e washer squirts.
(After operating several times, the wipers
operate once more time after a short delay
to prevent dripping. However, the dripping
prevention does not operate while the
vehicle is moving.)
Vehicles with headlight cleaners:
When the engine swit ch is in IGNITION
ON mode and the headlights are on, if the
lever is pulled, the he adlight cleaners will
operate once. After this, the headlight
cleaners will operate every 5th time the
lever is pulled.
■
The windshield wiper and washer can be
operated when
The engine switch is in IGNITION ON
mode. ■
Effects of vehicle speed on wiper opera-
tion
Even when the wipers are not in AUTO
mode, vehicle speed affects the time until
the drip prevention wiper sweep occurs.
With low speed windsh ield wiper operation
selected, wiper operation will be switched
from low speed to intermittent wiper opera-
tion only when the vehicle is stationary.
(However, when the sensor sensitivity is
adjusted to the highes t level, the mode can-
not be switched.) ■
Raindrop sensor ●
The raindrop sensor judges the amount
of raindrops.
An optical sensor is adopted. It may not
operate properly when sunlight from the
rising or setting of the sun intermittently
strikes the windshield, or if bugs etc. are
present on the windshield.

1934-5. Using the driving support systems
LS500_OM_OM50F54U_(U) 4
Driving WARNING●
If water droplets cannot be properly
removed from the area of the wind-
shield in front of the camera sensor by
the windshield wipers, replace the
wiper insert or wiper blade.
If the wiper inserts or wiper blades need
to be replaced, contact your Lexus
dealer. ●
Do not attach window tinting to the
windshield.●
Replace the windshield if it is damaged
or cracked.
If the windshield needs to be replaced,
contact your Lexus dealer.●
Do not get the camera sensor wet.●
Do not allow bright lights to shine into
the camera sensor.●
Do not dirty or damage the camera
sensor.
When cleaning the inside of the wind-
shield, do not allow glass cleaner to
contact the lens. Also, do not touch the
lens.
If the lens is dirty or damaged, contact
your Lexus dealer.
●
Do not subject the camera sensor to a
strong impact.
●
Do not change the installation position
or direction of the camera sensor or
remove it.
●
Do not disassemble the camera sen-
sor.
●
Do not modify any components of the
vehicle around the camera sensor
(inside rear view mirror, etc.) or ceiling.
●
Do not attach any accessories that
may obstruct the camera sensor to the
hood, front grille or front bumper.
Contact your Lexus dealer. ●
If a surfboard or other long object is to
be mounted on the roof, make sure
that it will not obstruct the camera sen-
sor. ●
Do not modify the headlights or other
lights.

1994-5. Using the driving support systems
LS500_OM_OM50F54U_(U) 4
Driving WARNING●
If the part of the windshield in front of
the camera sensor is fogged up or
covered with condensation or ice, use
the windshield defogger to remove the
fog, condensation or ice. ( → P.314)●
If water droplets cannot be properly
removed from the area of the wind-
shield in front of the camera sensor by
the windshield wipers, replace the
wiper insert or wiper blade.
If the wiper inserts or wiper blades need
to be replaced, contact your Lexus
dealer. ●
Do not attach window tinting to the
windshield.●
Replace the windshield if it is damaged
or cracked.
If the windshield needs to be replaced,
contact your Lexus dealer.●
Do not get the camera sensor wet.●
Do not allow bright lights to shine into
the camera sensor.●
Do not dirty or damage the camera
sensor.
When cleaning the inside of the wind-
shield, do not allow glass cleaner to
contact the lens. Also, do not touch the
lens.
If the lens is dirty or damaged, contact
your Lexus dealer.
●
Do not subject the camera sensor to a
strong impact.
●
Do not change the installation position
or direction of the camera sensor or
remove it.
●
Do not disassemble the camera sen-
sor.
●
Do not modify any components of the
vehicle around the camera sensor
(inside rear view mirror, etc.) or ceiling. ●
Do not attach any accessories that
may obstruct the camera sensor to the
hood, front grille or front bumper.
Contact your Lexus dealer. ●
If a surfboard or other long object is to
be mounted on the roof, make sure
that it will not obstruct the camera sen-
sor. ●
Do not modify the headlights or other
lights.

208 4-5. Using the driving support systems
LS500_OM_OM50F54U_(U) • If a vehicle ahead is irregularly shaped,
such as a tractor or side car
• If the sun or other light is shining directly
on a vehicle or guardrail ahead
• If a vehicle cuts in front of your vehicle or
emerges from beside a vehicle
• If a vehicle ahead makes an abrupt
maneuver (such as sudden swerving,
acceleration or deceleration)
• When suddenly cutting behind a preced-
ing vehicle
• When a vehicle ahead is not directly in
front of your vehicle
• When driving in incl ement weather such
as heavy rain, fog, snow or a sandstorm
• When the vehicle is hit by water, snow,
dust, etc. from a vehicle ahead
• When driving through steam or smoke
• When driving in a place where the sur-
rounding brightness changes suddenly,
such as at the entrance or exit of a tunnel
• When a very bright light, such as the sun
or the headlights of oncoming traffic,
shines directly in to the camera sensor
• When driving in a lo cation where there
are many objects which reflect radar,
such as a tunnel or parking garage
• When driving at night or in a tunnel with
the headlights off
• When the surrounding area is dim, such
as at dawn or dusk, or while at night or in
a tunnel
• After the engine has started the vehicle
has not been driven for a certain amount
of time • While making a left/r ight turn and for a
few seconds after making a left/right turn
• While driving on a curve and for a few
seconds after driving on a curve
• If your vehicle is skidding
• If the front of the vehicle is raised or low-
ered
• If the wheels are misaligned
• If a wiper blade is blocking the camera
sensor
• The vehicle is wobbling.
• The vehicle is being driven at extremely
high speeds.
• When driving on a hill
• If a sensor is misaligned
• If the headlights are misaligned
• When approaching a guardrail at a wide
or narrow angle
• When a vehicle approaches your vehicle
from the front left or right side while your
vehicle is entering an intersection with
poor visibility
• When a vehicle approaches your vehicle
from the rear left or right side
• When a vehicle approaches the side of
your vehicle at a shallow angle
• When driving on a road with a grade that
changes sharply (sha rp incline/decline)●
In some situations, such as the following,
the sensors may not detect the lane lines
or a safe space the vehicle can be steered
into, preventing the active steering assist
from operating properly:
• When the white (yellow) lane lines are
difficult to see, such as when they are
faint, diverging/merging, or a shadow is
cast upon them
• When the lane is more wide or narrow
than normal
• When there is a light and dark pattern on
the road surface, such as due to road
repairs
• If the system determines that a collision
can be avoided by only using the brakes

2094-5. Using the driving support systems
LS500_OM_OM50F54U_(U) 4
Driving • When a pedestrian is detected near the
centerline of the vehicle●
In some situations such as the following,
sufficient braking force or steering force
may not be obtained, preventing the sys-
tem from performing properly:
• If the braking functions cannot operate to
their full extent, such as when the brake
parts are extremely cold, extremely hot,
or wet
• If the vehicle is not properly maintained
(brakes or tires are excessively worn,
improper tire inflation pressure, etc.)
• When the vehicle is being driven on a
gravel road or other slippery surface
• If there are deep ruts in the road
• When driving on a slope
• When driving on a horizontally slanted
road●
Some pedestrians and bicyclists, such as
the following, may not be detected by the
sensors, preventing the system from
operating properly:
• Pedestrians and bicyclists shorter than
approximately 3.2 ft. (1 m) or taller than
approximately 6.5 ft. (2 m)
• Bicyclists riding on unusual bicycles
(bicycles for small children, tricycles,
folding bicycles, BMX bicycles, tandem
bicycles, etc.)
• Pedestrians and bicyclists who are wear-
ing white and look extremely bright
• Pedestrians and bicyclists which are not
illuminated by the headli ghts at night, in a
tunnel, etc.
• Pedestrians whose clothing appears to
be nearly the same co lor or brightness as
their surroundings
• Pedestrians and bicy clists near walls,
fences, guardrails, or large objects
• Pedestrians and bicyclists which are on a
metal object (manhole cover, steel plate,
etc.) on the road
• Pedestrians and bicyclists which are mov-
ing fast
• Pedestrians and bicy clists which change
speed or direction abruptly
• Pedestrians and bicyclists which suddenly
emerge from behind a vehicle or large
object
• Pedestrians and bicyclists which are
extremely close to the side of the vehicle
(outside rear view mirror, etc.) • Pedestrians and bicyclists wearing over-
sized clothing, such as a rain coat, long
skirt, etc., making their silhouette obscure
• Pedestrians and bicyclists who are carry-
ing large baggage, ho lding an umbrella,
etc., hiding part of their body
• Pedestrians and bicyclists behind an
object that hides part of their body
• Pedestrians and bicyclists who are bend-
ing forward or squatting
• Pedestrians who are pushing a stroller,
wheelchair, bicycle or other vehicle
• Groups of pedestrians/bicyclists which
are close together ●
Some guardrails, such as the following,
may not be detected by the sensors, pre-
venting the system from operating prop-
erly:
• Guardrails which are less than approxi-
mately 1.9 ft. (60 cm) tall
• Short guardrails
• Irregularly-shaped gu ardrails (wire cable
guardrails, guardrails made of thin poles,
etc.)
• Guardrails which are not illuminated by
the headlights at nigh t, in a tunnel, etc.
• Guardrails which appear to be nearly the
same color or brightness as their sur-
roundings
• Guardrails which appear to be nearly the
same shape as their surroundings (walls,
etc.)
• Guardrails which are over a metal object
(manhole cover, steel plate, etc.)
• Guardrails which are hidden behind thick
grass
• Guardrails which are extremely close to
the side of the vehicle (outside rear view
mirror, etc.)
• Curved guardrails or guardrails at the
entrance of a curve
●
In some situations su ch as the following,
the system may detect a pedestrian and
display a warning on the head-up display,
even though no pedestrian exists:
• If the front of the vehicle is raised or low-
ered, such as when the road surface is
uneven or undulating (due to ruts, etc.)
• When driving on a slope
• When driving on a horizontally slanted
road
• If the driver’s posture (driver seat posi-
tion) is extreme, such as excessively

216 4-5. Using the driving support systems
LS500_OM_OM50F54U_(U) road or a wall that may be mistaken for a
vehicle or pedestrian
• When driving near an object that reflects
radio waves, such as a large truck or
guardrail
• When driving near a TV tower, broad-
casting station, electric power plant, or
other location where strong radio waves
or electrical noise may be present■
Situations in which the system may not
operate properly●
In some situations such as the following, a
vehicle may not be detected by the radar
sensor and camera sensor, preventing
the system from operating properly:
• If an oncoming vehicle is approaching
your vehicle
• If a vehicle ahead is a motorcycle or bicy-
cle
• When approaching the side or front of a
vehicle
• If a preceding vehicle has a small rear
end, such as an unloaded truck
• If a preceding vehicle has a low rear end,
such as a low bed trailer
• If a vehicle ahead is carrying a load which
protrudes past its rear bumper
• If a vehicle ahead has extremely high
ground clearance
• If a vehicle ahead is irregularly shaped,
such as a tractor or side car
• If the sun or other light is shining directly
on a vehicle ahead
• If a vehicle cuts in front of your vehicle or emerges from beside a vehicle
• If a vehicle ahead makes an abrupt
maneuver (such as sudden swerving,
acceleration or deceleration)
• When suddenly cutting behind a preced-
ing vehicle
• When a vehicle ahead is not directly in
front of your vehicle
• When driving in incl ement weather such
as heavy rain, fog, snow or a sandstorm
• When the vehicle is hit by water, snow,
dust, etc. from a vehicle ahead
• When driving through steam or smoke
• When driving in a place where the sur-
rounding brightness changes suddenly,
such as at the entrance or exit of a tunnel
• When a very bright light, such as the sun
or the headlights of oncoming traffic,
shines directly into the camera sensor
• When the surrounding area is dim, such
as at dawn or dusk, or while at night or in
a tunnel
• After the engine has started the vehicle
has not been driven for a certain amount
of time
• While making a left/r ight turn and for a
few seconds after making a left/right turn
• While driving on a curve and for a few
seconds after driving on a curve
• If your vehicle is skidding
• If the front of the vehicle is raised or low-
ered
• If the wheels are misaligned
• If a wiper blade is blocking the camera
sensor

224 4-5. Using the driving support systems
LS500_OM_OM50F54U_(U) WARNING●
When the follow-up cruising display is
displayed ( → P.225) and the preced-
ing vehicle is being driven extremely
close to the left/right lane line. (Your
vehicle may follow the preceding vehi-
cle and depart from the lane.)●
Vehicle is driven where the road
diverges, merges, etc.
●
Asphalt repair marks, white (yellow)
line marks, etc. are present due to road
repair. ●
Objects or patterns that could be mis-
taken for white (yellow) lines are pres-
ent on the side of the road (guardrails,
curbs, reflective poles, etc.).
●
Vehicle is being driven around a sharp
curve. ●
Vehicle is driven on a road surface
which is slippery due to rainy weather,
fallen snow, freezing, etc. ●
Vehicle is driven on a snow-covered
road. ●
White (yellow) lines are difficult to see
due to rain, snow, fog, dust, etc. ●
Vehicle is driven in a temporary lane or
restricted lane due to construction
work. ●
Vehicle is driven in a construction
zone.
●
A spare tire, tire chains, etc. are
equipped.
●
When the tires have been excessively
worn, or when the tire inflation pres-
sure is low.
●
Tires which differ by structure, manu-
facturer, brand or tread pattern are
used.
●
Vehicle is driven in traffic lanes other
than on highways and freeways.
■
Preventing LTA system malfunctions
and operations performed by mistake
●
Do not modify the headlights or place
stickers, etc. on the surface of the
lights.